Mitsubishi Montero Sport (2004+). Manual — part 782
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
TSB Revision
ANTI-LOCK BRAKING SYSTEM (ABS) <RWD>
35B-9
CAUTION
To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
1. Connect scan tool MB991958 to the data link connector.
2. Turn the ignition switch to the "ON" position.
3. Select "Interactive Diagnosis" from the start-up screen.
4. Select "System Select."
5. Choose "ABS" from the "CHASSIS" tab.
6. Select "MITSUBISHI."
7. Choose "Actuator Test" from "ABS" screen.
8. Choose an appropriate item and select the "OK" button.
DIAGNOSTIC TROUBLE CODE CHART
M1352011300689
Follow the inspection chart that is appropriate for the diagnostic trouble code.
AK303629AB
MB991911
MB991827
MB991824
16-PIN
DIAGNOSTIC
TROUBLE
CODE NO.
INSPECTION ITEM
DIAGNOSTIC CONTENT
REFERENCE PAGE
11
Front right wheel speed sensor Open circuit
12
Front left wheel speed sensor
13
Rear right wheel speed sensor
14
Rear left wheel speed sensor
15
Wheel speed sensor
Abnormal output signal
16
Power supply system
21
Front right wheel speed sensor
22
Front left wheel speed sensor
23
Rear right wheel speed sensor
24
Rear left wheel speed sensor
33
Stoplight switch system
41
Front right solenoid valve inside hydraulic unit
42
Front left solenoid valve inside hydraulic unit
43
Rear solenoid valve inside hydraulic unit
51
Hydraulic unit valve relay open or short circuit
53
Malfunction of hydraulic unit
63
ABS-ECU
Replace the ABS-ECU
.
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
TSB Revision
ANTI-LOCK BRAKING SYSTEM (ABS) <RWD>
35B-10
DIAGNOSTIC TROUBLE CODE PROCEDURES
DTC 11, 12, 13, 14: Wheel Speed Sensor (Open Circuit)
DTC 21, 22, 23, 24: Wheel Speed Sensor
AC005089
Wheel Speed Sensor Circuit
AB
AC004817
CONNECTOR: A-18
AH
A-18 (B)
AC004843
CONNECTOR: A-31
AD
A-31 (B)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
TSB Revision
ANTI-LOCK BRAKING SYSTEM (ABS) <RWD>
35B-11
.
CIRCUIT OPERATION
• A toothed ABS rotor generates a voltage pulse as
it moves across the pickup field of each wheel
speed sensor.
• The amount of voltage generated at each wheel
is determined by the clearance between the ABS
rotor teeth and the wheel speed sensor, and by
the speed of rotation.
• The wheel speed sensors transmit the frequency
of the voltage pulses and the amount of voltage
generated by each pulse to the ABS-ECU.
• The ABS hydraulic unit modulates the amount of
braking force individually applied to each wheel
cylinder.
.
ABS DTC SET CONDITIONS
DTCs 11, 12, 13, 14 are set when signal is not input
due to breakage of the (+) or (
−) wire of one or more
of the four wheel-speed sensors.
DTCs 21, 22, 23, 24 are set in the following cases:
• Open circuit is not found but no input is received
by one or more of the four wheel-speed sensors
at 10 km/h (6 mph) or more.
• Sensor output drops due to a malfunctioning sen-
sor or warped ABS rotor.
.
TROUBLESHOOTING HINTS
The most likely causes for these DTCs to set are:
DTC 11, 12, 13, 14
• Malfunction of the wheel speed sensor
• Damaged wiring harness or connector
• Malfunction of the hydraulic unit (integrated with
ABS-ECU)
DTC 21, 22, 23, 24
• Malfunction of the wheel speed sensor
• Damaged wiring harness and connector
• Malfunction of the hydraulic unit (integrated with
ABS-ECU)
• Malfunction of the ABS rotor
• Malfunction of the wheel bearing
• Excessive clearance between the sensor and
ABS rotor
AC004837
CONNECTOR: A-85
AH
A-85 (B)
AC004261
CONNECTOR: C-17
AI
AC004844
CONNECTORS: E-29, E-39
AC
E-39 (B)
E-29 (B)
AC004845
CONNECTOR: E-45
AC
E-45 (B)
ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS
TSB Revision
ANTI-LOCK BRAKING SYSTEM (ABS) <RWD>
35B-12
.
DIAGNOSIS
Required Special Tools:
• MB991223: Harness Set
• MB991958: Scan Tool (MUT-III Sub Assembly)
• MB991824: Vehicle Communication Interface (V.C.I.)
• MB991827: MUT-III USB Cable
• MB991911: MUT-III Main Harness B
STEP 1. Check the wheel speed sensor installation.
Q: Is the wheel speed sensor bolted securely in place at
the front knuckle or the rear axle housing?
YES : Go to Step 2.
NO : Install it properly. Refer to
. Then go to Step
STEP 2. Measure the wheel speed sensor circuit
resistance at ABS-ECU connector A-85.
(1) Disconnect connector A-85 and measure at the harness
side.
(2) Measure the resistance between ABS-ECU connector
terminals 1 and 2, 3 and 4, 18 and 19, 20 and 21.
Standard Value: 1.3
− 1.5 kΩ
Q: Is the resistance between terminals 1 and 2, 3 and 4, 18
and 19, 20 and 21 within 1.3
− 1.5 kΩ?
YES : Go to Step 6.
NO : Go to Step 3, or Step 4, or Step 5
AC203837
18
12 11
20 19
10
3 2 1
13
14
22
23
17 16
25 24
15
8 7 6 5 4
21
9
26
A-85
HARNESS CONNECTOR:
COMPONENT SIDE
AB
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст